private firewall needs lot's of improvement in terms of firewall security protection to be considered as a good third party firewall software , improvements are required in the proper detection of each & every incoming & outgoing connection attempts made by any programs known or unknown from or to the system , port scan & buffer overflow & ddos attack detection & complete blocking needs to be improved & implemented if not present currently in private firewall because these are the most important firewall security protection parameters needed in any basic free or paid firewall software , detection level of intrusion & modern zero day hack attempts & techniques needs to be improved a lot lot more in private firewall because currently these features are very negligible in private firewall , lastly compatibility issues with windows 8/8.1 & latest versions of various popular & regularly used web browsers like google chrome & firefox & comodo dragon & other software programs needs to be improved a lot lot more